US Bridges

Denver Road over North Br Chippewa River

PoorPosted for load

Isabella County, Michigan · Sec 1-12 Nottawa Twp · Structure no. 000000000004366

Built
1937
88 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
123
2002 count
Owner
County
County Highway Agency

About this bridge

Denver Road over North Br Chippewa River is a steel stringer/multi-beam or girder carrying Denver Road over North Br Chippewa River in Isabella County, Michigan. It was built in 1937, so it is 88 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 123 vehicles a day, projected to reach 150 by 2022. The structure is 42 ft (12.8 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesDenver Road
CrossesNorth Br Chippewa River
LocationSec 1-12 Nottawa Twp
RouteCounty Highway 0
Coordinates43.71258, -84.85701
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.2 US tons
Inventory rating25.2 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length42 ft (12.8 m)
Longest span38 ft (11.5 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic123 (2002)
Projected traffic150 by 2022
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$190,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Denver Road over North Br Chippewa River built?

It was built in 1937, making it 88 years old in 2025.

What condition is Denver Road over North Br Chippewa River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does Denver Road over North Br Chippewa River carry?

About 123 vehicles per day (2002 count).

How long is Denver Road over North Br Chippewa River?

The structure is 42 ft (12.8 m) long with a longest span of 38 ft (11.5 m) and a deck 22 ft wide.

Who owns Denver Road over North Br Chippewa River?

It is owned by the County Highway Agency.